Mathematics
02.01.2021 12:27
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The points (30, 50). (-10, 30) and (-20, s) all lie on the same line. What is the

The points (30, 50). (-10, 30) and (-20, s) all lie on the same line. What is the value of s? Show your work.
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robertabenavidesq
robertabenavidesq
4,9(30 marks)

s = 25

Step-by-step explanation:

First we go from point (30, 50) to point (-10, 30).

Change in x: -10 - 30 = -40

Change in y: 30 - 50 = -20

Since a change in x of -40 results in a change in y of -20, we divide both changes by 4 to get:

a change of -10 in x results in a change of -5 in y.

Now we go from point (-10, 30) to point (-20, s).

The change in x is -20 - (-10) = -10

The corresponding chang ein y must be -5.

y = 30 - 5 = 25

s = 25

juliannabartra
juliannabartra
4,4(54 marks)

20

10

Two times as much

Is not.

Step-by-step explanation:

Shape 1 formula: 1/3(l)(w)(h) becomes 1/3(4)(3)(5) = 20.

Shape 2 formula: 1/3(1/2 B H1)H2 which becomes 1/3(1/2 x 4 x 5)3 = 10

Shape 1 is twice as much as 10 because 10x2=20

Ali said three times as much which is wrong

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